Lurking beneath the park’s natural wonders, earth’s largest supervolcano begins to awaken after 640,000 years. If—or when—it blows, two-thirds of the North American continent will be destroyed . . .

Now The Whole World Trembles . . . In Fear

Racing against time, Tucker Mayfield mobilizes a team to evacuate all visitors from the park—including his family at the Old Faithful Inn. But when the earthquakes intensify, and the death toll rises, a shockwave of panic spreads across the nation. Troops are deployed, emergency plans activated. But nothing can stop a natural disaster of this magnitude. When the volcano erupts, doomsday begins—and no one gets out alive . . .